How to design forms with validation states using CSS

Designing forms with validation states using CSS enhances user experience by providing instant feedback on user inputs. This example demonstrates how to visually represent different validation states, including default, valid, and invalid states.
CSS, Form Design, Validation States, User Experience, Web Development
<form action="" method="post"> <div class="form-group"> <label for="username">Username</label> <input type="text" id="username" class="form-control valid"> <div class="valid-feedback">Looks good!</div> <div class="invalid-feedback">Please choose a username.</div> </div> <div class="form-group"> <label for="email">Email</label> <input type="email" id="email" class="form-control invalid"> <div class="valid-feedback">Email is valid!</div> <div class="invalid-feedback">Please enter a valid email address.</div> </div> <button type="submit">Submit</button> </form> <style> .form-control { width: 100%; padding: 10px; margin-top: 5px; } .valid { border: 2px solid green; } .invalid { border: 2px solid red; } .valid-feedback, .invalid-feedback { display: none; } .valid:focus ~ .valid-feedback { display: block; } .invalid:focus ~ .invalid-feedback { display: block; } </style>

CSS Form Design Validation States User Experience Web Development

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